Digital Intensive Outphasing Transmitters — Design for Wideband Linear Response

CMOS technology development and the need for high-speed data links have shifted the research interests in traditional RF bands towards development of digital transmitter architectures. These architectures can potentially offer versatile operation modes and directly support seamless integration to digital back-end. In this presentation, we will be focusing spectral purity associated with digital outphasing transmitter and discuss the linearity issues related to digital modulator design. The nonlinearity sources and possible solutions to overcome nonlinearity will be addressed in the design examples.